Energy requirements during butanol production and in situ recovery by cyclic vacuum

Autor(es)

Mariano, Adriano Pinto ^{[1, 2]} ; Maciel Filho, Rubens ^[1] ; Ezeji, Thaddeus Chukwuemeka ^[2]

Afiliação do(s) autor(es)

^[1] Univ Campinas UNICAMP, Sch Chem Engn, Lab Optimizat Design & Adv Control LOPCA, BR-13083852 Campinas, SP - Brazil

^[2] Ohio State Univ, Ohio Agr Res & Dev Ctr, Dept Anim Sci, Wooster, OH 44691 - USA

• Tipo de documento: Artigo Científico
• Fonte: RENEWABLE ENERGY; v. 47, p. 183-187, NOV 2012.
• Citações Web of Science: 25

Resumo

Performance of the ABE fermentation and integrated product recovery by cyclic vacuum was investigated in a 14-1 bioreactor containing initial glucose concentration of 60 g l(-1) at 35 degrees C. The cyclic operation consisted of 2 h-vacuum-cycles separated by 4 h-fermentation intervals at atmospheric pressure. Application of periodic vacuum sufficed to eliminate hutanol inhibition of Clostridium beijerinckii 8052 culture, which tolerated alternate vacuum and atmospheric pressures. A 39% reduction in the energy requirement for acetone butanol ethanol (ABE) fermentation and in situ recovery by vacuum was achieved by changing the mode of vacuum operation from continuous (24 h vacuum time) to cyclic (12 h vacuum time). Analysis of the overall energy consumption for ABE fermentation and recovery (vacuum fermentation + distillation) demonstrated that cyclic vacuum ABE fermentation is more energy efficient than the conventional batch fermentation. (C) 2012 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 07/00341-1 - Modelagem, simulacao e controle de um processo fermentativo continuo extrativo de producao de butanol.
• Beneficiário: Adriano Pinto Mariano
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado